Tension ring closure for packing containers



April 20, 1937. A, MA R. 2,078,009

TENSION RING CLOSURE FOR PACKING CONTAINERS Filed June 21, 1935 ZSheetS-Sheetl April 20, 1937. A. MAUSER 2,078,009

TENSION R ING CLOSURE FOR PACKING CONTAINERS Filed June 21, 1935 2 Sheets-Sheet 2 Patented Apr. 20, 1937 UNITED STATES PATENT OFFICE IENSION RING CLOSURE FOR PACKING CONTAINERS Application June 21, 1935, Serial No. 27,805 In Germany March 28, 1935 '1 Claims. (01. 220-61) In tension ring closures two types of closure can be distinguished as regards the closure means. One type contains tension ring closures in which the tension ringhas at its ends specially provided closure means, mounted usually towards the middle of the vessel, while in the other type the closure means are formed directly from the ring material and are usually found on the outer side of the ring.

The tension ring closure according to the invention belongs to the second category of closure types, which are mostly intended for lighter packing containers.

As compared with the known types of closure the construction according to the invention shows some important improvements. It is known at one end of the tension ring to press out of the material abutments in the forms of lugs, eyes or the like, which engage in corresponding recesses in the other end of the ring. The engagement is mostly effected in such a manner that the ring ends when being fixed on, slide one over the other owing to the wedge action of the closure means, in order to cause the closure means to catch when the closed position of the ring is reached. The engagement of the closure members is securedby means of pins, by insertion of plates, by sealing and the like. The engagement parts which are pressed out of the ring mate-.

the tension ring. Since however, the latter consists of thin-walled material the danger of bending over or other deformation is obvious, and 49 also implies unreliable closure. Finally the sliding of the ring ends one over the other when the ring is fixed on, on account of the high projections, requires a, considerable spreading apart of the ring ends, so that a uniform pressure on the container cover and reliable sealing at the abutment of the ring is doubtful.

The closure construction according to the invention does not have the above drawbacks, and also has further important advantages. ing to the invention the engagement parts for the closure are pressed out in the peripheral direction of the tension ring so that when made of suitable length they give a high resistance 55 moment corresponding to the longitudinal axis any projections.

Accordof the cross-section when engaging behind the ring which is fixed on and exclude tearing away or deformation.

The engagement parts thus pressed out at one end of the ring, slide in slots in the other end of the ring in such a manner that when the engagement positions of the'projections are similarly directed, the ring ends are relatively rotated in the periphery of the thickness of the material in order to becaused to spring back into their initial position when the engagement place is reached. By this means the closure position of the tension ring is secured. It is thus a kind of bayonet closure. There is no lifting of the ring ends from the edge of the container, and consequently the cover packing is uniformly compressed even at the joint of the ring. Preferably two engagement parts are provided, arranged side by side in such a manner that the outer highest point of the tension ring covers Since the latter need only project with the ordinary thickness of material and are covered by the overlapping ring end, the tension ring in practice has no projection at the joint. Damage to the closure part by rolling the container on the tension ring or by turning it over is therefore excluded.

. Instead of similarly directed engagement parts it is also possible to provide oppositely directed abutments. In this case the rotation of the 3 ring ends is avoided and the parts formed by the slots in the ring ends when the ring is applied are forced back resiliently by the thickness of the engagement members, in order that when the closedposition is reached the projections may be caused to engage one behind the other.

The securing of the closure against undesired loosening is effected according to the invention by the provision of securing plates, pins or seals and by suitable construction of the engagement members.

In amodified form of the device according. to the invention the tension ring ends having engaging lugs are each provided in order to secure the closure, with fastening plates, the ends of which are provided with elongated openings. In the closed position these openingslie side by side in a known manner, so that a securing pin canbe placed through them, the projecting end of which has .a hole for'taking the seal cord. After the securing pin has been inserted it is not possible to separate the overlapping ring ends from the edge of the container, or to release the tension ring from the closed position. The closure formed in this way in combining various known features provides an entirely reliable closure arrangement for packing contain- .ers with completely removable cover, which also has the advantage over the known devices of greater cheapness. Even when the lugs are deformed the closure is still reliable because the lugs cannot be flattened as the thickness of material is sumcient to ensure engagement in any case. The closure parts are protected by-the edge of the cover and lie towards the middle of the container. They are scarcely subjected to any strain and can therefore be made of very thin material.

A number of constructional examples of the invention are illustrated in the accompanying drawings.

Fig. I shows the tension ring before the closure members have engaged, and Fig. II shows the same after engagement. Fig. III shows a crosssection of the tension ring closure and Fig. IV a plan.

I is the tension ring, 2 the container cover, 2 the containerfwall, 4 the cover packing and 5 the depressions which may be provided at the ends of the ring. for a tensioning tool. According to' Figs. I to IV two projections 6 are pressed out of one end of the ring, which, when the ring is applied, slide in the slots 1 against the oblique parts 8, in order to catch in the opening 9. In the construction according to Figs. I to IV the closure is fastened by means of plates} in secured on both ends of the .ring at the inside or the outside, which plates are provided in a.-known manner with bushes II which in the closed position lie side by side and receive a securing pin l2, which can be secured by sealing. This fastening only has the object of preventing the overlapping ring end being disengaged. The plates I0 are subjected to little strain and can be made of comparatively thin material.

Fig. V shows a front elevation and Fig. VI a cross-section of the tension ring I with oppositely arranged engagement members 6a, 9. The end carrying therecesses 9 is forked and has the two oblique parts Be, on which the projectionsta of the other 'end slide. In order to reduce the resilience to the halves of the thickness of the material of the ring, the end carrying the projections 6a may be provided with a slot l3 so as to form. two parts I, each having a projection 6a. In this case the closure is fastened by constructing the projections to as clips (Fig. VI). By this means the overlapping ring end is prevented from being forced off and released. This type of closure has the particular advantage that no additional means are required for fastening the closure. For receiving the sealing wire the ring ends-may be provided with coinciding holes l5. Instead of' on the oblique ,projection l1 slides over the lower ring end and on account of the resilient spreading of the part l6, catches in the recess l8 at the moment when the projections 6 engage. The engagement of the projection l1 seslides on h Oblique lug surface c and produce;

en the ring is fixed cures the overlapping ring end suiiloiently against being forced off and released. The part of the ring ends which carries the engagement parts l1, It may be bulged outwards somewhat to provide a deeper engagement of the projection l1 and better provision ofholes I8 for the seal ywire.

and in Fig. XI in a lateral cross-section. At

the upper and lower edge of one ring end are provided the pressed out projections 20 which on account oftheir oblique construction, force the other overlapping ring end apart resiliently when the ring I is being fixed on, in order to catch in the recesses 2| when the closed position is reached. In this case the ring ends are not forced away from. the edge of the container. For preventing the overlapping ring end and the closure from being forced oil, use is made of a thin sheet metal strip 22 fixed in the lower ring end, which completely surrounds the ring. The overlapping ring end has two oppositely directed pressed out clips 23 through which the strip 22-is drawn. The latter has at the upper ends slot 24 level with the edge of the ring, through which the otherend 25 is placed before being bent downwardly. Immediately behind the slot is a hole 26 for receiving a seal wire 21 which prevents the tongue 25 being pulled out of the slot 24.

A further constructional example of the inventiqn is illustrated in Fig. XII showing an elevation of the tension ring, and Fig. m showing a plan view of the closure. The one end of the tension ring a has a ing 0 pressed out of the material, which engages in the recess d of the in the holes i, the'cdge e of the overlappin a spreading so that when the closed position is reached the lug catches in the recess. At the same time the bushes k of the'plates f secured to the ring ends lie side by side so that the securing pin y can be pushed through. The projecting end of the securing pin has the boring I: for receiving a sealing cord. It is obviously within the scope of the invention to use instead of the lug described here, another engagement member pressed out of or provided on the ring material.

In accordance with the invention in all the engagement projections of various constructional forms the pressing is eflected in such a manner that the strain due to the ring tension is directed towards the raised web of the projections.

What I claim is:-

1. A tension ring closure for packing containers, comprising a ring having at one end a plurality of webs extending longitudinally and pressed out of the material of the ring to project radially and at the other end oblique parts on which the projections can slide so as to be deflected tangentially but not radially and behind which the projections catch in the closed position of the ringf 2. Atension ring closure as claimed in claim 1 in which the recesses for the engagement of the projections are similarly directed.

3. A tension ring closure as claimed in claim 1,

and havihg plates secured to the ends of the ring 4. A tension ring closure'as claimed in claini 1,

in which the height or the projections is approxi-. mately equal to the,thickness oi the material of the rin 5. A tension ringclosure as claimed in claim 1,

10 in which the recesses for the engagement of the projections are oppositely directed and the end of the ring carrying the projections has a longitudinal slot.

8. A tension ring closure as claimed in claim 1.

15 in .which the outer edges oi the overlap! rin:

- sionooe end are provided with oblique projections adapted to slide against the other ring end when the ring I is being applied, and to engage in corresponding recesses on the other end when the closed position is reached, for the purpose of fastening the closure.

l. A. tension ring closure as claimed in claim 1, having a sheet metal strip secured in the hollow of the cover ring end and completely surrounding the overlapping ring end, and a clip arranged on the overlapping rins end, the strip having a slot at one and through which its other end is passed before being bent over and secured by sealing tor the purpose oi fastening the closure.

" ALFONB MAUBEB. 

